Product Details: Update your semi with a comfortable ride and suspension height, with the Ridewell Extreme Air™ High Performance Height Control Valve that ensures you're Ready for the Road Ahead™. Thanks to its sophisticated design, this replacement valve is able to regulate the compressed air levels of a vehicle's suspension, allowing operators to increase or decrease ride height as needed. Crafted with an innovative body to quickly replenish air levels after dumping cargo loads. FleetPride is your First Click in Heavy Duty®.